69840

Appears in sequences

• a(n) = n^3 + (n+1)^3 + (n+2)^3 + (n+3)^3 + (n+4)^3.at n=22A027604
• Expansion of e.g.f.: 1/(1-2x-x^3).at n=6A052599
• E.g.f. 1/(1-x-3x^2).at n=6A052666
• Smallest number having exactly n divisors that are not greater than the number's greatest prime factor.at n=24A087134
• Numbers that have exactly eight prime factors counted with multiplicity (A046310) whose digit reversal is different and also has 8 prime factors (with multiplicity).at n=11A109028
• Triangle read by rows: T(n,k) = ((3/2)^k*2^n + (2/3)^k*3^n)*A008292(n+1,k+1).at n=22A154694
• Triangle read by rows: T(n,k) = ((3/2)^k*2^n + (2/3)^k*3^n)*A008292(n+1,k+1).at n=26A154694
• Number of reduced 3 X 3 semimagic squares with magic sum n.at n=32A173728
• Number of ways to place 2 nonattacking nightriders on an n X n cylindrical board.at n=19A196810
• Smallest number k such that prime(n) is the n-th divisor of k.at n=23A221647
• Number of pairs (x, y) with 0 <= x, y <= n such that the distance between two points is a positive integer.at n=34A228108
• Regular triangle array: number of [0-r]-covering hierarchies with thickness = e.at n=51A250485
• Smallest number whose largest odd noncomposite divisor is its n-th divisor.at n=24A384232